Feed intake and plasma amino acid level in chicks selected for high and average body weight, on a methionine-deficient diet.

Hikami, Yuzo; Yasunori, Toshika; Tanzan, Tetsuji; Hasegawa, Shin

doi:10.2141/jpsa.25.288

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…In poultry, the amino acid requirements can be estimated by determining the plasma uric acid concentration (Miles and Featherston, 1974; Min et al, 2017). The concentrations of urea nitrogen, uric acid, GOT, and GPT have been employed to determine the amino acid status (excess or deficiency) (Hikami et al, 1988; Gong et al, 2005; Wang et al, 2006; Azzam et al, 2011). Albumin and α-, β-, and γ-globulins represent the total protein content (Lumeij, 1997), and thus significant increases in the levels of albumin and globulins can reflect the total protein concentration (Hunt and Hunsaker, 1965).…”

Section: Resultsmentioning

confidence: 99%

Effects of dietary threonine supplementation on productivity and expression of genes related to protein deposition and amino acid transportation in breeder hens of yellow-feathered chicken and their offspring

et al. 2019

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This study investigated the effects of the dietary threonine (Thr) levels on the performance, offspring traits, embryo amino acid transportation, and protein deposition in breeder hens of yellow-feathered chickens. In total, 720 breeder hens of Lingnan yellow-feathered chickens were randomly assigned to 1 of 6 dietary treatments, with 6 replicates per treatment (20 birds per replicate). The breeder hens were fed either basal diet (Thr = 0.38%) or basal diet supplemented with 0.12, 0.24, 0.36, 0.48, or 0.60% Thr from 197 to 266 D. There was a positive response in terms of the laying rate after adding different levels of Thr to the diet, but no significant effects on the average daily gain, average daily egg weight, feed conversion ratio, average broken eggs, and unqualified egg rate (P > 0.05). However, the eggshell strength and eggshell percentage decreased in a linear manner as the dietary Thr concentration increased (P = 0.05). Dietary supplementation with Thr had significant effects on the expression of mucin 2 (MUC2) in the uterus and zonula occludens protein 1 (ZO-1) in the duodenum of breeders (P < 0.05). In chick embryos at embryonic age 18 D, significant upregulation of poultry target of rapamycin (pTOR) occurred in the liver and breast muscle, as well as threonine dehydrogenase (TDH) in the thigh, and aminopeptidase (ANPEP) (P < 0.05) in the duodenum and ileum due to dietary Thr supplementation, but there were no effects on MUC2 expression in the duodenum and ileum (P > 0.05). The livability of the progeny broilers tended to increase with the dietary Thr concentration (quadratic, P = 0.08). Thus, dietary supplementation with Thr had positive effects on the laying production by breeder hens and offspring performance, and it also regulated the expression levels of genes related to amino acid transportation and protein deposition. The optimal dietary Thr concentration that maximized the laying rate in yellow-feathered chicken breeders aged 197 to 266 D was 0.68% according to quadratic regression analysis.

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Section: Resultsmentioning

confidence: 99%

Effects of dietary threonine supplementation on productivity and expression of genes related to protein deposition and amino acid transportation in breeder hens of yellow-feathered chicken and their offspring

et al. 2019

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Possibility of amino acid nutrition in broiler

Ishibashi

Yonemochi²

2002

Animal Science Journal

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The consumption of poultry meats exceeds 50% of total meat consumption. With the outbreak of bovine spongiform encephalopathy and foot and mouth disease, the consumption of poultry meat is set to increase. The use of meat bone meal derived from cattle and pigs is prohibited. Therefore, plant protein has to be used more frequently and the importance of the study of amino acid nutrition is increasing. In order to improve dietary efficiency, it is necessary to elucidate the exact amino acid requirements of poultry. The amino acid requirements are not constant and are affected by various factors. By using the plasma amino acid concentration as a parameter, it is possible to predict the amino acid requirements within a short period using a small number of animals repeatedly. By satisfying the amino acid requirements through supplementing crystalline amino acids, it is possible to reduce dietary protein and excretory nitrogen simultaneously. However, when the dietary protein is reduced, the abdominal fat tends to increase. This is solved by deciding the optimum dietary protein level, but it is difficult to control the taste of poultry meat by dietary amino acids.

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Amino acid requirements of poultry. A review.

Ishibashi¹

1990

Jpn. poult. sci.

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Feed intake and plasma amino acid level in chicks selected for high and average body weight, on a methionine-deficient diet.

Cited by 3 publications

References 6 publications

Effects of dietary threonine supplementation on productivity and expression of genes related to protein deposition and amino acid transportation in breeder hens of yellow-feathered chicken and their offspring

Effects of dietary threonine supplementation on productivity and expression of genes related to protein deposition and amino acid transportation in breeder hens of yellow-feathered chicken and their offspring

Possibility of amino acid nutrition in broiler

Amino acid requirements of poultry. A review.

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